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- Sat May 12, 2018 1:12 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 1360: The Robin's Egg Nebula (2018 May 11)
- Replies: 9
- Views: 14925
Re: APOD: NGC 1360: The Robin's Egg Nebula (2018 May 11)
" The predominant blue-green hue of NGC 1360 seen here is the strong emission produced as electrons recombine with doubly ionized oxygen atoms. " Presumably you mean the collisionally excited lines? I'd be surprised if it's in the weak 4363A line; more likely the blue-green 4959, 5009 regi...